Ship model channel-type propulsion device

Abstract

The invention relates to a ship model channel-type propulsion device, which comprises a vertical shaft, a horizontal shaft and propellers. A vertical bevel gear is fixedly connected to the shaft end of the vertical shaft. A horizontal bevel gear is fixedly connected onto the horizontal shaft. The vertical shaft is connected with the output shaft of a servo motor in a driving way. The vertical bevel gear is engaged with the horizontal bevel gear. The vertical shaft penetrates through a shaft sleeve. One end of the shaft sleeve is fixedly connected with a flow guide shell. The other end of the shaft sleeve is fixedly connected with an installation seat. The servo motor is fixedly installed on the installation seat. The horizontal shaft penetrates through the flow guide shell. Two propellers are respectively installed at the two ends of the horizontal shaft and are symmetrically arranged. The flow guide shell and the propellers are arranged in a channel. Bearings are installed between the vertical shaft and the shaft sleeve and between the horizontal shaft and the flow guide shell. The ship model channel-type propulsion device has the advantages that the structure is compact, the size is small, the requirements on installation, propeller propelling force and power positioning testing of a mode in a water pond can be met and the testing effect is better.

Description

technical field [0001] The invention relates to the technical field of ship hydrodynamic tests, in particular to a position and motion control test of a ship model, in particular to a channel type propulsion device model for a ship model dynamic positioning test. Background technique [0002] The basic function of the ship's dynamic positioning system is to automatically control the ship's position and course through precise control commands. The ship's dynamic positioning system has the characteristics of being not affected by sea depth and sea conditions, accurate and fast positioning, and convenient operation, which can ensure the stability of the ship. . Ship dynamic positioning technology is an interdisciplinary high-tech. Regarding the feasibility of each link of the dynamic positioning system, mathematical modeling methods are usually used at home and abroad to verify the main functional indicators and performance parameters of the dynamic positioning system, and disc...

AI Technical Summary

Problems solved by technology

In the tank model test, when the model is scaled according to the geometric similarity, on the one hand, the channel propulsion device on the ship model is far from the real ship in scale, which can only meet the similar simulation of the ship; on the other hand, Even if the same scale ratio is adopted, due to the small reduction ratio, the channel propeller model will be too small, and the components that are too small will cause insufficient strength and wear problems, and the pushing torque generated by the propulsion device is weak and cannot reach According to the test requirements, too small a propulsion device will easily cause cavitation and hydrodynamic distortion problems under high-speed rotation, so that the relevant performance cannot be verified quantitatively. In addition, if the reduction ratio is small, the channel space will be greatly reduced, which will cause blocking effects. As a result, the push torque of the channel propulsion device of the ship model is different when it is working in forward and reverse directions, which is seriously inconsistent with the actual work at sea, so that accurate test results cannot be obtained; if the scaling ratio is increased, the thrust torque generated by the channel propulsion device will It can meet the test requirements, but increasing the scale will cause the ship model to exceed the installation conditions of the test tank, making the test impossible

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